单项选择题Whendiscussingplantmaintenancewithplantmaintenancemanagers,frequentlythetopicofusingpreventivemaintenance(PM)comesup.IfthisisusedextensivelyandthePMworkordersareregularlycompleted,whatistoldbythisabouttheoperation?()
A.It is likely that equipment will break down frequently.
B.It is likely that equipment will break down infrequently.
C.It shows that maintenance is performed on an as needed basis.
D.It shows that there are frequent crises when it comes to maintaining equipment.